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346 lines
9.4 KiB
346 lines
9.4 KiB
/* |
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* ASoC Driver for AudioInjector Pi octo channel soundcard (hat) |
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* |
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* Created on: 27-October-2016 |
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* Author: [email protected] |
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* based on audioinjector-pi-soundcard.c |
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* |
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* Copyright (C) 2016 Flatmax Pty. Ltd. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* version 2 as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/gpio/consumer.h> |
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#include <sound/core.h> |
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#include <sound/soc.h> |
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#include <sound/pcm_params.h> |
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#include <sound/control.h> |
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static struct gpio_descs *mult_gpios; |
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static struct gpio_desc *codec_rst_gpio; |
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static unsigned int audioinjector_octo_rate; |
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static bool non_stop_clocks; |
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static const unsigned int audioinjector_octo_rates[] = { |
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96000, 48000, 32000, 24000, 16000, 8000, 88200, 44100, 29400, 22050, 14700, |
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}; |
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static struct snd_pcm_hw_constraint_list audioinjector_octo_constraints = { |
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.list = audioinjector_octo_rates, |
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.count = ARRAY_SIZE(audioinjector_octo_rates), |
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}; |
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static int audioinjector_octo_dai_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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return snd_soc_dai_set_bclk_ratio(asoc_rtd_to_cpu(rtd, 0), 64); |
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} |
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static int audioinjector_octo_startup(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_min = 8; |
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asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_max = 8; |
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asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_min = 8; |
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asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_max = 8; |
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asoc_rtd_to_codec(rtd, 0)->driver->capture.channels_max = 8; |
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snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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&audioinjector_octo_constraints); |
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return 0; |
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} |
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static void audioinjector_octo_shutdown(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_min = 2; |
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asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_max = 2; |
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asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_min = 2; |
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asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_max = 2; |
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asoc_rtd_to_codec(rtd, 0)->driver->capture.channels_max = 6; |
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} |
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static int audioinjector_octo_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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// set codec DAI configuration |
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int ret = snd_soc_dai_set_fmt(asoc_rtd_to_codec(rtd, 0), |
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SND_SOC_DAIFMT_CBS_CFS|SND_SOC_DAIFMT_DSP_A| |
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SND_SOC_DAIFMT_NB_NF); |
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if (ret < 0) |
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return ret; |
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// set cpu DAI configuration |
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ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), |
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SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S| |
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SND_SOC_DAIFMT_NB_NF); |
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if (ret < 0) |
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return ret; |
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audioinjector_octo_rate = params_rate(params); |
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// Set the correct sysclock for the codec |
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switch (audioinjector_octo_rate) { |
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case 96000: |
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case 48000: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000, |
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0); |
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break; |
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case 24000: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/2, |
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0); |
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break; |
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case 32000: |
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case 16000: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/3, |
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0); |
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break; |
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case 8000: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/6, |
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0); |
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break; |
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case 88200: |
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case 44100: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400, |
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0); |
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break; |
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case 22050: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400/2, |
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0); |
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break; |
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case 29400: |
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case 14700: |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400/3, |
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0); |
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break; |
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default: |
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return -EINVAL; |
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} |
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} |
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static int audioinjector_octo_trigger(struct snd_pcm_substream *substream, |
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int cmd){ |
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DECLARE_BITMAP(mult, 4); |
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memset(mult, 0, sizeof(mult)); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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if (!non_stop_clocks) |
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break; |
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fallthrough; |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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switch (audioinjector_octo_rate) { |
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case 96000: |
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__assign_bit(3, mult, 1); |
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fallthrough; |
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case 88200: |
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__assign_bit(1, mult, 1); |
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__assign_bit(2, mult, 1); |
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break; |
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case 48000: |
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__assign_bit(3, mult, 1); |
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fallthrough; |
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case 44100: |
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__assign_bit(2, mult, 1); |
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break; |
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case 32000: |
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__assign_bit(3, mult, 1); |
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fallthrough; |
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case 29400: |
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__assign_bit(0, mult, 1); |
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__assign_bit(1, mult, 1); |
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break; |
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case 24000: |
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__assign_bit(3, mult, 1); |
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fallthrough; |
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case 22050: |
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__assign_bit(1, mult, 1); |
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break; |
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case 16000: |
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__assign_bit(3, mult, 1); |
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fallthrough; |
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case 14700: |
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__assign_bit(0, mult, 1); |
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break; |
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case 8000: |
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__assign_bit(3, mult, 1); |
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break; |
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default: |
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return -EINVAL; |
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} |
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break; |
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default: |
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return -EINVAL; |
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} |
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gpiod_set_array_value_cansleep(mult_gpios->ndescs, mult_gpios->desc, |
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NULL, mult); |
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return 0; |
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} |
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static struct snd_soc_ops audioinjector_octo_ops = { |
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.startup = audioinjector_octo_startup, |
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.shutdown = audioinjector_octo_shutdown, |
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.hw_params = audioinjector_octo_hw_params, |
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.trigger = audioinjector_octo_trigger, |
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}; |
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SND_SOC_DAILINK_DEFS(audioinjector_octo, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link audioinjector_octo_dai[] = { |
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{ |
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.name = "AudioInjector Octo", |
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.stream_name = "AudioInject-HIFI", |
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.ops = &audioinjector_octo_ops, |
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.init = audioinjector_octo_dai_init, |
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.symmetric_rate = 1, |
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.symmetric_channels = 1, |
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SND_SOC_DAILINK_REG(audioinjector_octo), |
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}, |
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}; |
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static const struct snd_soc_dapm_widget audioinjector_octo_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("OUTPUTS0"), |
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SND_SOC_DAPM_OUTPUT("OUTPUTS1"), |
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SND_SOC_DAPM_OUTPUT("OUTPUTS2"), |
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SND_SOC_DAPM_OUTPUT("OUTPUTS3"), |
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SND_SOC_DAPM_INPUT("INPUTS0"), |
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SND_SOC_DAPM_INPUT("INPUTS1"), |
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SND_SOC_DAPM_INPUT("INPUTS2"), |
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}; |
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static const struct snd_soc_dapm_route audioinjector_octo_route[] = { |
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/* Balanced outputs */ |
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{"OUTPUTS0", NULL, "AOUT1L"}, |
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{"OUTPUTS0", NULL, "AOUT1R"}, |
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{"OUTPUTS1", NULL, "AOUT2L"}, |
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{"OUTPUTS1", NULL, "AOUT2R"}, |
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{"OUTPUTS2", NULL, "AOUT3L"}, |
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{"OUTPUTS2", NULL, "AOUT3R"}, |
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{"OUTPUTS3", NULL, "AOUT4L"}, |
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{"OUTPUTS3", NULL, "AOUT4R"}, |
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/* Balanced inputs */ |
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{"AIN1L", NULL, "INPUTS0"}, |
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{"AIN1R", NULL, "INPUTS0"}, |
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{"AIN2L", NULL, "INPUTS1"}, |
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{"AIN2R", NULL, "INPUTS1"}, |
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{"AIN3L", NULL, "INPUTS2"}, |
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{"AIN3R", NULL, "INPUTS2"}, |
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}; |
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static struct snd_soc_card snd_soc_audioinjector_octo = { |
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.name = "audioinjector-octo-soundcard", |
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.dai_link = audioinjector_octo_dai, |
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.num_links = ARRAY_SIZE(audioinjector_octo_dai), |
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.dapm_widgets = audioinjector_octo_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(audioinjector_octo_widgets), |
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.dapm_routes = audioinjector_octo_route, |
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.num_dapm_routes = ARRAY_SIZE(audioinjector_octo_route), |
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}; |
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static int audioinjector_octo_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &snd_soc_audioinjector_octo; |
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int ret; |
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card->dev = &pdev->dev; |
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if (pdev->dev.of_node) { |
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struct snd_soc_dai_link *dai = &audioinjector_octo_dai[0]; |
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struct device_node *i2s_node = |
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of_parse_phandle(pdev->dev.of_node, |
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"i2s-controller", 0); |
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struct device_node *codec_node = |
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of_parse_phandle(pdev->dev.of_node, |
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"codec", 0); |
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mult_gpios = devm_gpiod_get_array_optional(&pdev->dev, "mult", |
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GPIOD_OUT_LOW); |
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if (IS_ERR(mult_gpios)) |
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return PTR_ERR(mult_gpios); |
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codec_rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset", |
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GPIOD_OUT_LOW); |
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if (IS_ERR(codec_rst_gpio)) |
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return PTR_ERR(codec_rst_gpio); |
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non_stop_clocks = of_property_read_bool(pdev->dev.of_node, "non-stop-clocks"); |
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if (codec_rst_gpio) |
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gpiod_set_value(codec_rst_gpio, 1); |
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msleep(500); |
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if (codec_rst_gpio) |
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gpiod_set_value(codec_rst_gpio, 0); |
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msleep(500); |
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if (codec_rst_gpio) |
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gpiod_set_value(codec_rst_gpio, 1); |
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msleep(500); |
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if (i2s_node && codec_node) { |
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dai->cpus->dai_name = NULL; |
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dai->cpus->of_node = i2s_node; |
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dai->platforms->name = NULL; |
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dai->platforms->of_node = i2s_node; |
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dai->codecs->name = NULL; |
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dai->codecs->of_node = codec_node; |
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} else |
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if (!i2s_node) { |
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dev_err(&pdev->dev, |
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"i2s-controller missing or invalid in DT\n"); |
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return -EINVAL; |
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} else { |
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dev_err(&pdev->dev, |
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"Property 'codec' missing or invalid\n"); |
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return -EINVAL; |
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} |
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} |
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ret = devm_snd_soc_register_card(&pdev->dev, card); |
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if (ret != 0) |
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); |
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return ret; |
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} |
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static const struct of_device_id audioinjector_octo_of_match[] = { |
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{ .compatible = "ai,audioinjector-octo-soundcard", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, audioinjector_octo_of_match); |
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static struct platform_driver audioinjector_octo_driver = { |
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.driver = { |
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.name = "audioinjector-octo", |
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.owner = THIS_MODULE, |
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.of_match_table = audioinjector_octo_of_match, |
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}, |
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.probe = audioinjector_octo_probe, |
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}; |
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module_platform_driver(audioinjector_octo_driver); |
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MODULE_AUTHOR("Matt Flax <[email protected]>"); |
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MODULE_DESCRIPTION("AudioInjector.net octo Soundcard"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("platform:audioinjector-octo-soundcard");
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